US9473281B2 - Methods, apparatuses and computer program products for providing dynamic uplink-downlink reconfiguration information to user equipments - Google Patents

Methods, apparatuses and computer program products for providing dynamic uplink-downlink reconfiguration information to user equipments Download PDF

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US9473281B2
US9473281B2 US14/306,569 US201414306569A US9473281B2 US 9473281 B2 US9473281 B2 US 9473281B2 US 201414306569 A US201414306569 A US 201414306569A US 9473281 B2 US9473281 B2 US 9473281B2
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uplink
downlink configuration
signaling
window
downlink
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US20140376460A1 (en
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Kari J. Hooli
Esa T. TIIROLA
Timo E. Lunttila
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Nokia Technologies Oy
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04W72/042—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • the exemplary and non-limiting embodiments of this invention relate generally to wireless communication methods and apparatuses and, more specifically to methods and apparatuses for providing dynamic uplink-downlink reconfiguration information to user equipments
  • LTE Long Term Evolution
  • eIMTA Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation
  • a method comprises generating information that is indicative of: (a) a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and (b) an application time at which the new uplink-downlink configuration is to be applied; and providing the generated information to a user equipment, wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • This method complements UL-DL configuration signaling by providing more reliable reception of UL-DL configuration information. This indication is performed with smaller signaling overhead compared to conventional schemes and with reasonable complexity on both the UE side and an eNB side.
  • an apparatus comprises one or more processors and one or more memories including computer program code, the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to perform generating information that is indicative of: (a) a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and (b) an application time at which the new uplink-downlink configuration is to be applied; and providing the generated information to a user equipment, wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • a computer program product comprises a computer-readable storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for generating information that is indicative of: (a) a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and (b) an application time at which the new uplink-downlink configuration is to be applied; and providing the generated information to a user equipment, wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • a method comprises receiving first information at a user equipment that is indicative of a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and receiving second information at the user equipment that is indicative of an application time at which the new uplink-downlink configuration is to be applied; wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • an apparatus comprises one or more processors and one or more memories including computer program code, the one or more memories and the computer program code configured, with the one or more processors, to cause the apparatus to perform receiving first information at a user equipment that is indicative of a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and receiving second information at the user equipment that is indicative of an application time at which the new uplink-downlink configuration is to be applied; wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • a computer program product comprises a computer-readable storage medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for receiving first information at a user equipment that is indicative of a signaling time at which an uplink-downlink configuration signaling for a new uplink-downlink configuration is to take place, and receiving second information at the user equipment that is indicative of an application time at which the new uplink-downlink configuration is to be applied; wherein the generated information specifies the new uplink-downlink configuration to be applied to the user equipment.
  • FIG. 1 is a data structure diagram showing an illustrative radio frame that includes a plurality of subframes.
  • FIG. 2 is a process flow diagram that illustrates a method, and a result of execution by one or more processors of a set of computer program instructions embodied on a computer readable memory, for providing information to a user equipment specifying an uplink-downlink configuration to be applied to the user equipment according to a set of exemplary embodiments of the present invention.
  • FIG. 3 is an exemplary data structure diagram used to perform time division duplexing uplink-downlink reconfiguration signaling according to a set of exemplary embodiments of the present invention
  • FIG. 4 illustrates a wireless communications network according to a set of exemplary embodiments of the present invention
  • eIMTA Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation
  • TDD time division duplexing
  • eNB enhanced Node B
  • a predefined cell-specific UL-DL configuration is broadcast in the cell using a System Information Block #1 (SIB-1).
  • SIB-1 System Information Block #1
  • Legacy user equipments (UEs) configured to operate in accordance with any of the 3GPP Release 8 through Release 11 standards follow this predefined configuration at all times.
  • TDD reconfiguration occurs among the seven presently-existing configurations described in 3GPP TS 36.211, Section 4.2, version 8.9.0 (Release-8).
  • TDD reconfiguration can occur with (at most) radio frame periodicity for those UEs configured to implement the Flex configuration. Typically, radio frame periodicity may, but need not, be on the order of 10 milliseconds.
  • radio frame periodicity may, but need not, be on the order of 10 milliseconds.
  • the introduction of additional or alternative TDD UL-DL configurations may be considered as well. Such additional or alternative configurations are well within the scope of the present invention.
  • FIG. 1 is a data structure diagram showing an illustrative radio frame that includes a plurality of subframes 0-9 for each of an exemplary SIB-1 configuration #0 and a Flexible (Flex) configuration.
  • the Flex configuration is made available to Release 12 UEs that are configured to implement a flexible UL-DL mode.
  • In each UL-DL configuration there are fixed subframes where the link direction is always predetermined. These fixed subframes are denoted as Downlink (D), Special (S) and Uplink (U) Additionally, there are flexible (F) subframes. These F subframes may be used as either D subframes or U subframes. The number of F subframes that are provided may depend on the specifics of a given scenario (e.g.
  • the SIB-1 configured UL-DL configuration of FIG. 1 defines whether a given subframe 0-9 in the radio frame is downlink, special, or uplink subframe.
  • some of the uplink subframes can be changed into downlink subframes.
  • the 6 th subframe may be changed into a downlink subframe only, but not into an uplink subframe. This has been assumed in the example of FIG. 1 .
  • the 6 th subframe may be considered as a fixed subframe (S).
  • PHY signaling encompasses UE specific or UE common signaling, as well as using either existing or newly defined Downlink Control Information (DCI) formats.
  • DCI Downlink Control Information
  • L1 Layer One
  • PDCCH Physical Downlink Control Channel
  • PDCCH Physical Downlink Control Channel
  • the signaling mechanisms considered for UL-DL reconfiguration may be classified as common PHY signaling methods and dedicated PHY signaling methods.
  • Common PHY signaling may be based on a specific DCI scrambled with a new Radio Network Temporary Identifier (RNTI), such as a Flex-TDD-RNTI.
  • RNTI Radio Network Temporary Identifier
  • An actual indication of the TDD UL-DL configuration may be included in the payload of the DCI. This technique is the baseline solution that was formulated at the RAN WG1 #73 meeting.
  • Dedicated PHY signaling may, but need not, be explicit.
  • a new bit field of two or three bits is added into a UL and/or DL grant to indicate the UL-DL configuration in the subsequent radio frame. This signaling is used to aid UE blind decoding as well as Channel State Information (CSI) measurement during flexible subframes.
  • implicit dedicated signaling uses an implicit indication that corresponds to an eNB-scheduling-based approach.
  • the UE in the case of a scheduled Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) transmission, the UE considers that the subframe is used for UL transmission; otherwise, UE has to assume that the subframe is used for DL transmission and will try to detect the EPDCCH/PDCCH. Based on decisions made at the RAN WG1 #73 meeting, dedicated PHY signaling can be considered as a complementary solution to the common PHY approach.
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the UE When the UE wakes up, the UE needs to follow the SIB-1 defined UL-DL configuration and is able to do so, as long as the UE is able to detect the common UL-DL configuration indication in the specific downlink subframe (e.g., Subframe 0).
  • the specific downlink subframe e.g., Subframe 0
  • the error rate achievable by common signaling varies between 10 ⁇ 3 and 10 ⁇ 2, depending on the exact signaling type.
  • the error case related to common signaling is caused mainly by erroneous detection of PDCCH/EPDCCH.
  • the related error cases are missed detection and false alarm.
  • the main problems related to these error cases are that the eNB has no way of determining whether or not the UE has missed detection, or whether or not the UE assumes wrong information due to a false alarm.
  • any of various problems may occur when the UE has an incorrect or inaccurate understanding of the current UL-DL configuration. These problems include DL and/or UL throughput loss, erroneous CSI measurement and reporting, as well as problems related to Hybrid Automatic Repeat Request (HARQ)/scheduling timing (depending on the selected signaling scheme).
  • HARQ Hybrid Automatic Repeat Request
  • the time span of the error case with common signaling may involve multiple subframes, or even one or more entire radio frames, depending on the reconfiguration periodicity.
  • the error rate of UL-DL reconfiguration signaling should be reduced to the level of 1e-5 or 1e-6, in order to minimize the consequences of the signaling errors.
  • the problem is that a reduced error rate will introduce considerable overhead on either the DL side, the UL side, or both.
  • one of the challenges related to common signaling is that, as a practical matter, it is fairly difficult to improve the reliability of the signaling. For example, it is a challenge to provide UE-specific resources in the uplink to confirm that UL-DL reconfiguration was received correctly.
  • an explicit indicator is included in the PHY signaling transmitted to the UE.
  • the indicator may always be present in certain DCI formats.
  • the error rate achievable by dedicated signaling is on the order of 10 ⁇ 2 .
  • the benefit of dedicated signalling is that the eNB may use uplink signal (PUCCH or PUSCH) to identify missed detection separately for each UL-DL reconfiguration. This indicates that the error rate of UL-DL reconfiguration signalling can be reduced to the level of 10 ⁇ 4 with the assumption that DTX detection at the eNB operates with error rate of 1e-2.
  • One of the limitations related to dedicated signaling is that there may be UEs which do not have valid UL-DL configuration information available. For example, in cases where the indicator is included in the dedicated DCI, only scheduled UEs become aware of the current configuration.
  • Implicit signaling is a specific form of dedicated signaling where the UE determines the link direction implicitly by means of EPDCCH blind decoding.
  • the advantages of this approach include low overhead, whereas the main challenges relate to UE power consumption due to excessive blind decoding, false-positive problems, as well as challenges related to CSI measurement & reporting.
  • ZTE Zhongxing Telecommunication Equipment
  • R1-132109 the possibility of using explicit signaling as a complementary or enhanced function on top of implicit signaling.
  • Texas Instruments points out in [R1-131945] that the reliability of common signaling can be improved by transmitting more than one reconfiguration signal within a notification window. For example, if the minimum UL/DL reconfiguration time is 20 ms, the same EPDCCH carrying the reconfiguration command can be repeated within a 20-millisecond window. Similar to ZTE, Ericsson considers the possibility of using both explicit and implicit signaling [R1-132025].
  • Explicit signaling may be used to inform the UE about valid subframes for CSI measurements to lower the number of impacted measurements.
  • the UE may not have reliable enough information on the UL-DL configuration at the time when the reconfiguration should be applied.
  • these existing solutions cannot be optimized for different scenarios. For example, signaling overhead is not minimized in a typical scenario where the switching periodicity applied by the network is on the order of tens of milliseconds. Hence, there is a clear need for more advanced solutions.
  • a higher layer signaling protocol is provided to facilitate Common PHY signaling of a UL-DL reconfiguration. More specifically, the idea is to provide the UE with assistance information regarding when and how configuration signaling may take place and when the new configuration should be applied.
  • the exemplary embodiments of the invention may include one or more of the aspects described hereinafter.
  • FIG. 2 is a process flow diagram that illustrates a method, and a result of execution by one or more processors of a set of computer program instructions embodied on a computer readable memory, for providing information to a UE specifying a UL-DL configuration to be applied to the UE.
  • the information is indicative of: (a) a signaling time at which a UL-DL configuration signaling for a new UL-DL configuration is to take place, and (b) an application time at which the new UL-DL configuration is to be applied.
  • This method complements UL-DL configuration signaling by providing more reliable reception of UL-DL configuration information. This indication is performed with smaller signaling overhead compared to conventional schemes and with reasonable complexity on both the UE side and an eNB side.
  • FIG. 2 commences at any of blocks 201 , 203 , or 204 as follows.
  • Allocate at least one time period for a UL-DL configuration persistency window Allocate at least one time period for a UL-DL configuration persistency window.
  • a UL-DL configuration change to a new UL-DL configuration may only occur at the commencement of the UL-DL configuration persistency window, and not at any other time during the UL-DL configuration persistency window.
  • the operational sequence then progresses to block 202 where a first signaling parameter is transmitted that represents a starting point of the UL-DL configuration persistency window.
  • a second signaling parameter is transmitted that represents a duration of the UL-DL persistency window.
  • the signaling may contain two parts: Xa, which is the starting point of the UL-DL configuration persistency window; and Xb, which is the duration of the UL-DL configuration persistency window.
  • the duration of the configuration may be infinite, i.e. the UL-DL configuration does not change at all.
  • This unchanging configuration may be used to facilitate new carrier types, such as (but not limited to) operation with different HARQ timings.
  • Block 202 may be performed using higher layer signaling.
  • the first and second signaling parameters are received by a user equipment (UE).
  • the UE may assume that the UL-DL configuration will not change during the UL-DL configuration persistency window.
  • the UL-DL configuration change is only allowed to occur at the beginning of the UL-DL configuration persistency window.
  • the duration and/or the starting point of the persistency window may be predetermined (for example, fixed in the specification), in which case no signaling is needed.
  • This new UL-DL configuration may be regarded as a UL-DL reconfiguration.
  • Block 203 is applicable in situations where common signaling is used.
  • the first and second parameters may be included into every message (e.g. DL assignment and/or UL grant). These parameters are denoted as Ya (periodicity) and Yb (offset).
  • Common signaling to indicate the new UL-DL configuration may be transmitted multiple times within the UL-DL configuration persistency window to improve the reliability of the signalling (i.e. repetition gain).
  • the periodicity could be predetermined and, in these instances, no signaling would be required.
  • the time instances when the signaling of UL-DL reconfiguration may occur are configured via higher layer signaling.
  • the UL-DL reconfiguration window may, but need not, be of the same duration as the UL-DL configuration persistency window.
  • the UE should preferably receive information about the new UL-DL configuration that is to be applied with some advance notice.
  • the position (timing) on the UL-DL reconfiguration window may, but need not, be predetermined.
  • the reconfiguration window may be predetermined with respect to the UL-DL configuration persistency window. The same predetermined timing may be employed, or a fixed predetermined time offset may be employed.
  • the position on the UL-DL reconfiguration window may, but need not, be configurable.
  • a first signaling parameter is transmitted to represent a starting point of the UL-DL reconfiguration window
  • a second signaling parameter is transmitted to represent a duration of the UL-DL reconfiguration window.
  • the position of the UL-DL reconfiguration window may be configurable by means of two parameters: Za, which specifies a possible starting point of the UL-DL reconfiguration window, and Zb, which specifies a duration of the UL-DL reconfiguration window.
  • the first and second signaling parameters are received by the UE.
  • FIG. 2 may be viewed as method steps, and/or as operations that result from operation of computer program code embodied on a memory and executed by a processor, and/or as a plurality of coupled logic circuit elements constructed to carry out the associated function(s).
  • FIG. 3 is an exemplary data structure diagram for TDD UL reconfiguration signaling.
  • a first UL-DL reconfiguration window 303 and a second UL-DL reconfiguration window 304 there are predetermined time instances (denoted as X) when the reconfiguration signalling may be transmitted.
  • the UE receives the UL-DL configuration to be applied in a respective UL-DL configuration persistency window corresponding to a UL-DL reconfiguration window.
  • a first UL-DL configuration persistency window 301 corresponds to the first UL-DL reconfiguration window 303
  • a second UL-DL configuration persistency window 302 corresponds to the second UL-DL reconfiguration window 304 .
  • the UE may also improve the reliability of UL-DL configuration determination by receiving multiple UL-DL reconfiguration messages at any of the times X, and illustratively combining these reconfiguration messages.
  • reconfiguration window-related parameters may be shared with one or more neighboring cells.
  • the parameters Xa and Xb may be shared with the neighboring cells.
  • X2 interface/signaling may, but need not, be used for conveying this information.
  • additional UL-DL reconfiguration information is sent on an as-needed basis.
  • an eNB may want to minimize the overhead due to common signaling (such as common DCI) used to convey UL-DL configuration.
  • the resulting overhead can be controlled with parameter Ya.
  • the eNB may send additional (extra) indicators or information. These indicators may, but need not, be sent at the beginning of the UL-DL reconfiguration window, or in situations where a certain UE wakes up from discontinuous transmission (DTX) mode.
  • the eNB may use a PDCCH/EPDCCH common search space for sending the additional common indicators.
  • the PDCCH/EPDCCH UE specific search space for the extra UL-DL reconfiguration indicators. In this case, only some of the UEs are able to receive the indicator.
  • the eNB may also use dedicated signaling to send additional indicators. For example, UL grant or a DL assignment can be used for such purpose.
  • the eNB may utilize only fixed subframes to make sure that these UEs receive the scheduling information properly (eNB operation).
  • the UE may operate according to implicit signaling. In this case, the UE performs PDCCH/EPDCCH blind detection from all possible DL subframes until valid UL-DL configuration is received. Similarly, specific operation according to invalid UL-DL configurations may be applied for Channel State Information (CSI) reporting.
  • CSI Channel State Information
  • improved error case handling is provided by formulating predefined rules for the cases where the UE has obtained multiple mutually conflicting UL-DL configurations during the UL-DL reconfiguration window as, for example, due to false positive detection.
  • Such examples may include: Assume a UL-DL configuration having the highest number of occurrences (e.g., in the case UE has received configuration 5 twice and configuration 0 once, assume that configuration 5 is the valid configuration). Consider this as an error case. Operate according to the rules defined for the case having no valid UL-DL configuration available.
  • common DCI is designed in such a way that CRC length is virtually increased from 16 bits by setting some of the bits or codepoints in the DCI to predetermined values. This will reduce the probability of false positive detection.
  • improved recovery from missed configuration signaling is provided by designing common DCI to contain both current and next UL-DL configuration.
  • An invalid UL-DL configuration field or an additional codepoint can be used when next UL-DL configuration is not yet defined. For example, since 3 bits are needed for indicating one of the 7 UL-DL configurations, there will be one redundant codepoint available for indicating that the eNB has not yet decided what the upcoming UL-DL configuration shall be.
  • This signaling is an additional or alternative complementary technique for realizing the UL-DL configuration window. This signaling may be realized, for example, with proper setting of configuration parameters [Xa, Xb, Ya, Yb, Za, Zb].
  • the reconfiguration window is not configured at all. Instead, only the UL-DL configuration persistency window is configured and the common DCI always contains both a current and a next UL-DL configuration (or invalid field indicating that next UL-DL configuration is not yet defined by eNB). It might be an implementation issue when the eNB is required to decide the next UL-DL configuration. In some sets of additional embodiments of the invention, there may be certain requirements set for the eNB as for when the eNB must decide upon the next UL-DL configuration.
  • the eNB signals only an upcoming UL-DL configuration without signaling any current UL-DL configuration.
  • one or more special configuration options are provided. For example, using three sets of parameters ([Xa, Xb, Ya, Yb, Za, Zb] allows for various specific configuration options. Examples of such configuration are described hereinafter.
  • Zb Xb. In these scenarios, it may suffice to have a single configuration parameter for Zb and Xb.
  • higher layer signaling is used for transmitting one or more parameters.
  • the configuration of Xa,Xb (UL-DL configuration persistency window), Ya,Yb (signalling channel), as well as Za,Zb (UL-DL reconfiguration window) can be performed via higher layer signalling such as, for example, Radio Resource Configuration (RRC) signalling.
  • RRC Radio Resource Configuration
  • BCCH broadcast control channel
  • some of the parameters may be fixed or depend on each other.
  • the possible options for starting positions and the periodicities may be tabulated similar to e.g. periodic CSI reporting configuration signaling (e.g. Table 7.2.2-1A in TS 36.213). In this case it is sufficient to have only one configuration parameter for the timing of each of the three aspects (X, Y, Z).
  • the various embodiments of the invention described herein may be used to improve the reliability of common UL-DL reconfiguration signaling.
  • An upcoming configuration is signaled before the actual change is to take place.
  • signaling may be provided which is indicative that the upcoming configuration has not yet been decided.
  • the current configuration can also be signaled during the use of the configuration. Recovery is faster as the UE does not need to wait for the next period in case that it missed the signaling for current configuration.
  • the techniques described herein can be used in combination with all signaling options available for dynamic UL-DL reconfiguration.
  • the eNB has full control to trade-off between reliability and overhead.
  • the signaling handles also coordination between neighboring cells.
  • the signaling is optimized for the most common scenario having reconfiguration periodicity on the order of tens of milliseconds, but has flexibility to efficiently cover also shorter and longer periodicities.
  • FIG. 4 illustrates details of a user device which may suitably be implemented as a user equipment (UE) 200 , configured according to one or more embodiments of the present invention.
  • the user device 200 comprises a data processor (DP) 204 , memory (MEM) 206 , with data 208 and software in the form of one or more programs 210 residing in the memory 206 .
  • the user device 200 further comprises a dual receiver/transmitter assembly 212 , transmitting and receiving data using an antenna assembly 214 .
  • the antenna assembly includes an antenna 216 , which may be tuned so as to cover specified frequency bands.
  • the frequency ranges of the antenna assembly 214 may be changed by the use of an active tuner 218 , which may be connected to or disconnected from the antenna 216 by a switching assembly 220 under the control of a data processor 222 .
  • a dedicated data processor 222 is illustrated here, but it will be recognized that control of the switching assembly 220 may be accomplished by the processor 204 , or any other suitable processor.
  • FIG. 4 further illustrates a base station, suitably implemented as an eNodeB (eNB) 250 .
  • the base station may comprise a cellular base station, a relay station, a remote radio head, any other type of network node with wireless communication capability and which serves as an access portal enabling any of the above types of UE 200 to gain access to the wireless network of a specific type of radio access technology.
  • the eNB 250 comprises a data processor (DP) 252 and memory (MEM) 254 , with the memory storing data 256 and software in the form of one or more programs (PROGs) 258 .
  • the eNB 250 further comprises a transmitter 260 and receiver 262 , for communicating with one or more devices such as the UE 200 using an antenna 264 .
  • At least one of the PROGs 210 in the UE 200 is assumed to include a set of program instructions that, when executed by the associated DP 202 , enable the device to operate in accordance with the exemplary embodiments of this invention, as detailed above.
  • the exemplary embodiments of this invention may be implemented at least in part by computer software stored on the MEM 206 , which is executable by the DP 202 of the UE 200 , or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • At least one of the PROGs 258 in the eNB 250 is assumed to include a set of program instructions that, when executed by the associated DP 252 , enable the device to operate in accordance with the exemplary embodiments of this invention, as detailed above.
  • the exemplary embodiments of this invention may be implemented at least in part by computer software stored on the MEM 254 , which is executable by the DP 252 of the eNB 250 , or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • Electronic devices implementing these aspects of the invention need not be the entire devices as depicted at FIG. 2 or may be one or more components of same such as the above described tangibly stored software, hardware, firmware and DP, or a system on a chip SOC or an application specific integrated circuit ASIC.
  • the various embodiments of the UE 200 can include, but are not limited to personal portable digital devices having wireless communication capabilities, including but not limited to cellular telephones, navigation devices, laptop/palmtop/tablet computers, digital cameras and music devices, and Internet appliances.
  • Various embodiments of the computer readable MEM 206 and MEM 254 include any data storage technology type which is suitable to the local technical environment, including but not limited to semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, removable memory, disc memory, flash memory, DRAM, SRAM, EEPROM and the like.
  • Various embodiments of the DP 202 and the DP 252 include but are not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and multi-core processors.
  • code may be used herein to represent one or more of executable instructions, operand data, configuration parameters, or other information stored in at least one of the MEM 206 or the MEM 254 .
  • This code may include program instructions that, when executed by the associated DP 204 or 252 , enable at least one of the UE 200 or the eNB 250 to operate in accordance with the exemplary embodiments of this invention as detailed herein. That is, the exemplary embodiments of this invention may be implemented at least in part by computer software executable by a processor of an electronic device, or by hardware, or by a combination of software and hardware and firmware.
  • the various exemplary embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in embodied firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • While various aspects of the exemplary embodiments of this invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, embodied software and/or firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof, where general purpose elements may be made special purpose by embodied executable software.
  • the integrated circuit, or circuits may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or data processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this invention.
  • Various embodiments described above may be implemented in software, hardware, application logic or a combination of software, hardware and application logic.
  • the software, application logic and/or hardware may reside on at least one memory, at least one processor, an apparatus or, a computer program product.
  • the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
  • a “computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of an apparatus described and depicted in FIG. 4 .
  • a computer-readable medium may comprise a computer-readable storage medium that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • the different functions discussed herein may be performed in a different order and/or concurrently with other. Furthermore, if desired, one or more of the above-described functions may be optional or may be combined.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
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AU2020223764A1 (en) 2020-09-17
EP3011786A1 (fr) 2016-04-27
CN105409312B (zh) 2019-09-27
BR112015032010A2 (pt) 2017-07-25
WO2014202556A1 (fr) 2014-12-24
EP3011786B1 (fr) 2019-11-13
KR101909196B1 (ko) 2018-10-18
JP6913653B2 (ja) 2021-08-04
JP2016525294A (ja) 2016-08-22
AU2022205147A1 (en) 2022-07-28
SG11201510180XA (en) 2016-01-28
CN105409312A (zh) 2016-03-16
AU2014283410A1 (en) 2016-02-11
US20140376460A1 (en) 2014-12-25
PL3011786T3 (pl) 2020-06-01
BR112015032010B1 (pt) 2023-10-03
JP2018121370A (ja) 2018-08-02

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